The warders fell ill after inhaling second-hand smoke from the lethal drug

Steve Farrell, from the the Community trade union which represents members at HMP Addiewell, claimed two officers had fallen “seriously ill”, but were now recovering and in a stable condition.

He told BBC Radio’s Good Morning Scotland programme: “It’s been reported to us for a couple of months from the staff and from our members in Addiewell that the illegal highs and Spice in particular is causing some real concern.”

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